Island



(No Model.)

W. M. JACKSON.

DEVICE EUR PROMOTING GQMBUSTION.

Patented June 10, 1884.

lllllllllllwilllll .HMI 'im UNITED STATES PATENT Oriana WALTER MARSHJACKSON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE AMERICANCOMBUSTION COMPANY, OF SAME PLACE.

DEVICE FOR PROMOTING COMBUSTION.

SPECIFICATION forming -part of Letters Patent No.. 300,080, dated Junei0, 1884. Application filed March 12, 1884. (No model.)

To all whom it may concern:

Beit known that I, WALTER M. Jamison, of Providence, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Devices for Promoting Combustion, and I do herebydeclare the following to be a full, clear, and exact -description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improvement in devices for the promotion ofthe combustion of fuel, the object of my invention being to provide adevice of this character which shall be adapted to conduct a thin sheetor jet of steam enveloped in heated fresh air into and upon the ignitedsurface of abed of combustible material, for the purpose of decomposingsaid steam by being brought in contact with `carbon in an incandescentstate and burning the gases resulting from such decomposition,

and thereby promoting combustion by preventing the escape of the freecarbon,the parts to be so constructed and arranged that the products ofcombustion will be prevented from mixing with the steam or air beforethey issue from a common outlet;v and with these ends in view myinvention consists in certain novel features of construction andcombinations of parts, as will be hereinafter fully described, andpointed out in the claims.

In the accompanying drawings, Figure 1 is a view in elevation of myimprovement. Fig. 2 is a vertical section thereof. Fig". 3 is a planView of the upper and lower ends of the tube or air-supply pipe.

A represents the tube or air-inlet of my irnproved device, beingprovided at its upper and lower ends with the cross-arms or supports B,said tube being held in position in the walls of the fire-box by the nutG. The central portion of the bracket B is enlarged in cross-section, asshown in Fig. 3, and is provided with a hole or perforation, a, throughwhich passes the steam-pipe D, the lower end of which extends a shortdistance beyond the lower end of the tube, and is provided with a malescrew-thread, as shown at b, the said steam-pipe D being held in properposition by 5o a lock-nut, c, fitting on the steam-pipe and -steam orheated air before theyT escape into or impinging against the bracket orsupport B. The upper fend of the tube A is providcdwith a malescrew-thread, d, on which fits the head or shell E, preferably of theform shown, the curved end of which is provided with au elongated slot,F, through which passes the heated air from the tube A.

To the screw-threaded end of the steam-pipe VD and within the shell E issecured the nozzle G, the lower end of which extends within a 6o shortdistance of the lower end of the shell E, said nozzle being provided atits lower end with the slot e, registering and running in the samedirection with the slot F, said slot e being preferably formed a littleslanting. 65

My improved device is placed over the burning fuel, the tube A beingconnected with the fire-box and the pipe D with the boiler,through whichpipe the steam passes and issues through the slot c, which, being madeslanting, throws 7o the widened jet of steam at an angle on the fire.The steam, passing out of the slot in the shell E, draws the heated airup through the tube A and envelops and passes out with the jet of steam.By this construction and arrangement of parts the material products ofcombustion such as carbonio, sulphurous, and phosphorous acids andnitrogen-are prevented from becoming mixed with either the over the firethrough the common outlet, the shell E being tightly closed around thetube A. Instead of using the tube A, the shell E might be tightlysecuredto the fire-pot, and a cemented or packed joint may be made against the8 5 inner wall of said pot, to prevent the admixture of the products ofcombustion with the air or steam before'they issue from the shell.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. The combination, with an air-heating tube provided at one end with ashell having an elongated air-discharge opening, of a steampipe providedwith a discharge-nozzle located within said shell, said nozzle having anelongated opening formed therein, the opening in the steam-nozzle beinglocated in close proximity to the air-discharge opening, the parts beingconstructed and arranged to inject into IOO the fire-box a thin jet ofsteam enveloped by a thin stratum of heated air and prevent the ingressto the shell of the products of Combustion, substantially as set forth.

2. The combination7 with an air-heating tube provided at one end with ashell forming au enlarged air-Chamber, said shell having an elongatedair-discharge opening, of a steampipe provided With a nozzle locatedWithin the shell, said nozzle being provided with an elongated openinglocated in elose proximity to the similar shaped opening in the shell7substantially as set forth.

3. The combination7 Withthe tube provided

